Wire up docker build and trim README

.drone.yml

@@ -0,0 +1,13 @@
+---
+kind: pipeline
+
+name: default
+
+steps:
+  - name: Build Drone docker image
+    image: docker:stable
+    volumes:
+      - name: docker_sock
+        path: /var/run/docker.sock
+    commands:
+      - docker build --no-cache -t autonomic/drone:drone .

README.md

@@ -2,41 +2,12 @@
 
 > https://drone.io/
 
-## Setup
-
-### Pre-requisites
-
-1. You have SSH access to dokku.autonomic.zone
-1. You have sudo privilege escalation working
-
-```
-Host dokku.autonomic.zone
-  Hostname dokku.autonomic.zone
-  User <your-username>
-  Port 222
-  IdentityFile ~/.ssh/<your-ssh-key-private-file>
-```
-
-See the password-store under `autonomic-dokku` for your sudo password.
-
-### Environment
-
-1. Clone the [infrastructure repository](https://gitlab.com/autonomic-cooperative/infrastructure)
-1. Copy the sample file: `cp .envrc.sample .envrc`
-1. Ensure that the .envrc `PASSWORD_STORE_DIR` env var points to the `infrastructure/credentials/password-store`
-
-### Python
-
-You only need to do this if you're working with Ansible vault (encrypting/decrypting new secrets).
-
-```bash
-$ python3 -m venv .venv
-$ source .venv/bin/activate
-$ pip install -r requirements.txt
-```
-
 ## Deploy
 
+We deploy Drone by hand because it cannot replace itself during the deployment process.
+
+See the [wiki](https://git.autonomic.zone/autonomic-cooperative/organising/wiki/hacking-on-dokku-apps) for documentation about setting up your SSH connection.
+
 ```bash
 $ git remote add dokku dokku@dokku.autonomic.zone:drone
 $ git push dokku